Centre de recherche du Centre hospitalier de l'Université de Montréal (CRCHUM), Montréal, Quebec, Canada.
Department of Social and Preventive Medicine, Université de Montréal, Montréal, Quebec, Canada.
Health Promot Chronic Dis Prev Can. 2017 Aug;37(8):238-247. doi: 10.24095/hpcdp.37.8.02.
While some studies have suggested associations between shift work and obesity, few have been population-based or considered multiple shift schedules. Since obesity is linked with several chronic health conditions, understanding which types of shift work influence obesity is important and additional work with more detailed exposure assessment of shift work is warranted.
Using multivariate polytomous logistic regression, we investigated the associations between shift work (evening/night, rotating and other shift schedules) and overweight and obesity as measured by body mass index cross-sectionally among 1561 men. These men had previously participated as population controls in a prostate cancer case-control study conducted in northeastern Ontario from 1995 to 1999. We obtained information on work history (including shift work), height and weight from the existing self-reported questionnaire data.
We observed an association for ever (vs. never) having been employed in rotating shift work for both the overweight (OR [odds ratio] = 1.34; 95% CI [confidence interval]: 1.05-1.73) and obese (OR = 1.57; 95% CI: 1.12-2.21) groups. We also observed nonsignificant associations for ever (vs. never) having been employed in permanent evening/night shifts. In addition, we found a significant trend of increased risk for both overweight and obesity with increasing duration of rotating shift work.
Both the positive association between rotating shift work and obesity and the suggested positive association for permanent evening/night shift work in this study are consistent with previous findings. Future population-based research that is able to build on our results while examining additional shift work characteristics will further clarify whether some shift patterns have a greater impact on obesity than others.
虽然有一些研究表明轮班工作与肥胖之间存在关联，但很少有研究基于人群或考虑多种轮班时间表。由于肥胖与多种慢性健康状况有关，因此了解哪些类型的轮班工作会影响肥胖非常重要，需要进一步进行更详细的轮班工作暴露评估。
使用多元多项逻辑回归，我们调查了轮班工作（夜班/通宵、轮班和其他轮班时间表）与超重和肥胖之间的关联，这些男性先前作为人群对照参加了 1995 年至 1999 年在安大略省东北部进行的前列腺癌病例对照研究。我们从现有的自我报告问卷数据中获取了有关工作经历（包括轮班工作）、身高和体重的信息。
我们观察到，对于超重（OR [比值比] = 1.34；95%CI [置信区间]：1.05-1.73）和肥胖（OR = 1.57；95%CI：1.12-2.21）组，曾经（vs. 从未）从事过轮班工作的人都存在关联。我们还观察到，曾经（vs. 从未）从事过永久性夜间/夜班工作的人存在与超重相关的非显著关联。此外，我们发现，随着轮班工作时间的增加，超重和肥胖的风险呈显著上升趋势。
本研究中轮班工作与肥胖之间的正相关以及永久性夜间/夜班工作的正相关与之前的研究结果一致。未来基于人群的研究，如果能够在检查其他轮班工作特征的同时，进一步利用我们的研究结果，将进一步明确是否某些轮班模式比其他轮班模式对肥胖的影响更大。
